Fire-extinguisher.



W. GALLENKAMPQ FIRE EXTINGUISHER. APPLICATION FILED APR. 10, 1912.

Patented Jan. 28, 1913.

"rrnn STATES PATENT oration.

WILHELM GALLENKAMP, 01E MUNICH, GER.

rrnanxrmeursnnn.

Specification of Letters Patent.

Patented Jan. 28, l id.

Application filed April 10, 1912. Serial No. 889,739.

the operation of the device at the desired time. Such a-stopper alsorequires extra room in the extinguisher, and projects undesirably nearthe discharge outlet. Moreover such stoppers are not always reliable andany absorption of water around them causes undue dilution of the acid,in the case of sulfuric, and sometimes causes escape of the resultingdiluted and expanded acid into the surrounding liquid, with resultingpremature discharge of the extinguisher. The.

diluted acid is alsowlien weakened less able to withstand extreme coldand extreme climates. In the case of hydrochloric acid any escape of theacid might cause destruction of the metal of the vessel itself.

According to the present invention the above-mentioned disadvantages areovercome. Instead of using such a solid stopper for the acid bottlethere is used a stopper'or upper layer of a, suitable liquid which isplaced above the acid in the acid receptacle and separates it from thesurrounding water or aqueous liquid containing the other in gredients ofthe extinguishing composition. This liquid which is placed in the upperpart or neck of the acid bottle, is of such a nature that it does notmixeither with the acid, or with the other liquid (solution ofhicarbonate), its specific gravity being between those of these twoliquids. Thus with sulfuric acid, (sp. g1'. 1.84), for example, carbontctr'achlorid could be used, its specific gravity being 1.63; withhydrochloric acid, (sp. gr. 1.20), o-nitro-toluene (sp. gr. 1.163) couldbe used; or other suitable liquids having similar specific gravities.These liquid layers or liquid stoppers form a most 1nt1- mate contactwith the neck of the bottle, and thus prevent any mixing of the liquidsabove and below them; also any inoperativeness, due to-stieking of asolid stopper, is avoided. The provision of the liquid stopper of thepresent invention consequently gives an or rangement which is at thesame time simple and reliable, and free from the disadvan.'

tages of the known solid stoppers.

The present" invention is further illustrated bythe accompanyingdrawings in E is the vessel containing the water or aqueous solution ofbicarbonate used for extinguishing, F the bottle supported by, andattached to, the vessel E, S the acid in the bottle, and T the'stopperor plug or layer of liquid in the neck of the bottle forming a separatng layer between the acid and the aqueous layer above. The arrangementof the present invention otters the added ad vantage that the acidbottle can be, as shown,

submerged in the aqueous liquid, without in- V termixing therewith. Atthe same time, however, when the acid does escape it is prevented fromescaping except through the 7 liquid above it, and a thorough mixing,and

a prevention of the escape of the acid itself,

is assured. The vessel is also in this we protected from the directaction of the aci I claim:

1. In a fire extinguisher an acid bottle. provided with a stopper in theform of a liquid non-reactive with the acid, and of less specificgravity.

In testimony whereof I atlix my signature in presence-ct two witnesses.

. WILHELM GALLENKAMP. \Vitnesscs Bum-1mm GEUSTSCII, Guono MUSSGILLEN.

